<template>
  <div :class="className" :style="{ height: height, width: width }" />
</template>

<script>
import * as echarts from 'echarts/lib/echarts';

require("echarts/theme/macarons"); // echarts theme
import resize from "./mixins/resize";

const defaultConfig = {
  tooltip: {
    trigger: "item",
    formatter: "{a} <br/>{b} : {c} ({d}%)",
  },
  legend: {
    left: "center",
    bottom: "10",
    // data: ["Industries", "Technology", "Forex", "Gold", "Forecasts"],
    data: []
  },
  series: [
    {
      name: "",
      type: "pie",
      roseType: "radius",
      radius: [15, 95],
      center: ["50%", "38%"],
      data: [
        // { value: 320, name: "Industries" },
        // { value: 240, name: "Technology" },
        // { value: 149, name: "Forex" },
        // { value: 100, name: "Gold" },
        // { value: 59, name: "Forecasts" },
      ],
      animationEasing: "cubicInOut",
      animationDuration: 2600,
    },
  ],
};

export default {
  mixins: [resize],
  props: {
    className: {
      type: String,
      default: "chart",
    },
    width: {
      type: String,
      default: "100%",
    },
    height: {
      type: String,
      default: "300px",
    },
    chartData: {
      type: Object,
      required: true,
    },
  },
  data() {
    return {
      chart: null,
    };
  },
  watch: {
    chartData: {
      deep: true,
      handler(val, oVal) {
        if (val) {
          this.setOptions(val);
        }
      }
    },
  },
  mounted() {
    this.$nextTick(() => {
      this.initChart();
    });
  },
  beforeDestroy() {
    if (!this.chart) {
      return;
    }
    this.chart.dispose();
    this.chart = null;
  },
  methods: {
    initChart() {
      this.chart = echarts.init(this.$el, "macarons");
      this.setOptions(defaultConfig);
    },
    setOptions(chartData) {
      this.$nextTick(() => {
        this.chart.setOption(chartData, {
          notMerge: false,
        });
      });
    },
  },
};
</script>
